The objective of this study is to test different formulations with a new optimization
program. The area under study is located close to Los Angeles, and it has experienced a large
drawdown of the water table, with related subsidence. The analyses utilizes Ground Water
Management (GWM), a public domain code distributed by the USGS as a process within
MODFLOW 2000. The different algmithms within GWM were tested with a large-scale
transient unconfined system. The different analysis allowed the verification of the program. In
this application, GWM is used to optimize the resources, and the MODFLOW packages from the
LANOPT Model are used to simulate the system.